1938-1939 394 p., 29 plates, new blue cloth, gilt title on the spine. The scarce volume 24 with papers on fossil molluscs by Palmer (Nomenclatorial notes on Eocene Mollusca), Ingram (Notes on Cypraea heilprini and C. chilona with new species from the Pliocene of Costa Rica & New fossil Cypraeidae from the Miocene of the Dominican Republic and Panama) and Conrad (Reprint of Conrad’s Jackson Eocene fossils) and a larger (218 p., 14 pls) paper by Caster mainly on Brachiopods (A Devonian Fauna from Colombia). A good, clean and well bound copy, complete with the index.